SOLUTION: when you are adding and subtracting rational numbers is there an easier way to remembe the rules that go to each.

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Question 59518This question is from textbook mATHEMATICS
: when you are adding and subtracting rational numbers is there an easier way to remembe the rules that go to each. This question is from textbook mATHEMATICS

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
when you are adding and subtracting rational numbers is there an easier way to remember the rules that go to each.
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You can only add or subtract fractions when they have the same denominator.
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Example:
3/4 +2/5
Can't add as they stand, but:
3/4 = 3*5/4*5=15/20
2/5 = 2*4/5*4=8/20
Now both fractions have the same denominator
so they can be added:
Adding you get 23/20
Hope this helps.
Cheers,
Stan H.